A Montgomery County businessman is behind bars, charged in the shooting death of his wife at their Lake Conroe home, according to the Montgomery County Sheriff's Office.

Sheriff's deputies arrived at the home in the gated April Sound subdivision around 7 p.m. Sunday and found Donna Smith Quinlan, 56, dead with multiple gunshot wounds to her upper torso and head, Lt. Dan Norris, spokesman at the Sheriff's Office, stated in a press release.

Investigators said that the family had just returned from a trip and that the shooting occurred after an argument between the couple.

Thomas Quinlan is founder and owner of Willis-based InkJet Inc., a chemical company founded in 1990. According to Quinlan's page on Linkedin.com, he founded the firm "with $35,000 and has a current net worth of a good 8 figures and growing yearly."